Problems with function ranef in lme4 - R-SIG-mixed-models

Sun, Mar 14, 2010 4:29 AM #

Dear list members,

I am trying the function ranef from package lme4 and I got the following 
error warning:

 > data(sleepstudy)
 > fm1 <- lmer(Reaction ~ Days + (Days|Subject), sleepstudy)
 > ranef(fm1)
Error en UseMethod("ranef") :
  no applicable method for 'ranef' applied to an object of class "mer"

What could be the problem?
Best,

Manuel

Manuel Sp?nola, Ph.D.
Instituto Internacional en Conservaci?n y Manejo de Vida Silvestre
Universidad Nacional
Apartado 1350-3000
Heredia
COSTA RICA
mspinola at una.ac.cr
mspinola10 at gmail.com
Tel?fono: (506) 2277-3598
Fax: (506) 2237-7036

Ben Bolker

Sun, Mar 14, 2010 7:02 AM #

Manuel Sp?nola wrote:

My guess is that you have nlme loaded at the same time.

  search()
  detach("package:nlme")

  If that doesn't work, post the results of sessionInfo().

Ben Bolker
Associate professor, Biology Dep't, Univ. of Florida
bolker at ufl.edu / people.biology.ufl.edu/bolker
GPG key: people.biology.ufl.edu/bolker/benbolker-publickey.asc

Manuel Spínola

Sun, Mar 14, 2010 9:32 AM #

Thank you very much Ben.  That was the problem.

Manuel

Ben Bolker wrote:

Manuel Sp?nola, Ph.D.
Instituto Internacional en Conservaci?n y Manejo de Vida Silvestre
Universidad Nacional
Apartado 1350-3000
Heredia
COSTA RICA
mspinola at una.ac.cr
mspinola10 at gmail.com
Tel?fono: (506) 2277-3598
Fax: (506) 2237-7036